Experimental determination of electro-osmotic drag coefficient in nafion membrane for fuel cells

Shanhai Ge, Baolian Yi, Pingwen Ming

    Research output: Contribution to journalArticle

    78 Citations (Scopus)

    Abstract

    The electro-osmotic drag coefficient in Nafion 117 membrane is determined experimentally at different temperatures and water contents of the membrane. A pseudo-two-dimensional, steady-state diffusive model for water vapor transport through Nafion membrane based on nonequilibrium membrane/gas diffusion layer interface is presented to determine the electro-osmotic drag coefficient and average water content. For the membrane in contact with water vapor, the electro-osmotic drag coefficient increases with increasing water content or water activity in the membrane. At the same water activity, temperature does not show influence on the electro-osmotic drag coefficient in the membrane in contact with water vapor. For the membrane in contact with liquid water on both sides, the electro-osmotic drag coefficient in the membrane increases linearly with temperature. High-frequency resistances of the cells using Nafion 117 and 112 membranes are measured to evaluate the electro-osmotic drag coefficients obtained. The calculated membrane resistance based on a diffusive model agrees well with the experimental data under different operating conditions.

    Original languageEnglish (US)
    Article number007608JES
    JournalJournal of the Electrochemical Society
    Volume153
    Issue number8
    DOIs
    StatePublished - Aug 2006

    Fingerprint

    drag coefficients
    Drag coefficient
    fuel cells
    Fuel cells
    membranes
    Membranes
    Steam
    Water vapor
    Water content
    moisture content
    water vapor
    Water
    perfluorosulfonic acid
    water
    gaseous diffusion
    Diffusion in gases
    Contacts (fluid mechanics)
    Temperature
    temperature

    All Science Journal Classification (ASJC) codes

    • Electrochemistry
    • Surfaces, Coatings and Films
    • Surfaces and Interfaces

    Cite this

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    abstract = "The electro-osmotic drag coefficient in Nafion 117 membrane is determined experimentally at different temperatures and water contents of the membrane. A pseudo-two-dimensional, steady-state diffusive model for water vapor transport through Nafion membrane based on nonequilibrium membrane/gas diffusion layer interface is presented to determine the electro-osmotic drag coefficient and average water content. For the membrane in contact with water vapor, the electro-osmotic drag coefficient increases with increasing water content or water activity in the membrane. At the same water activity, temperature does not show influence on the electro-osmotic drag coefficient in the membrane in contact with water vapor. For the membrane in contact with liquid water on both sides, the electro-osmotic drag coefficient in the membrane increases linearly with temperature. High-frequency resistances of the cells using Nafion 117 and 112 membranes are measured to evaluate the electro-osmotic drag coefficients obtained. The calculated membrane resistance based on a diffusive model agrees well with the experimental data under different operating conditions.",
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    Experimental determination of electro-osmotic drag coefficient in nafion membrane for fuel cells. / Ge, Shanhai; Yi, Baolian; Ming, Pingwen.

    In: Journal of the Electrochemical Society, Vol. 153, No. 8, 007608JES, 08.2006.

    Research output: Contribution to journalArticle

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    AU - Ge, Shanhai

    AU - Yi, Baolian

    AU - Ming, Pingwen

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    N2 - The electro-osmotic drag coefficient in Nafion 117 membrane is determined experimentally at different temperatures and water contents of the membrane. A pseudo-two-dimensional, steady-state diffusive model for water vapor transport through Nafion membrane based on nonequilibrium membrane/gas diffusion layer interface is presented to determine the electro-osmotic drag coefficient and average water content. For the membrane in contact with water vapor, the electro-osmotic drag coefficient increases with increasing water content or water activity in the membrane. At the same water activity, temperature does not show influence on the electro-osmotic drag coefficient in the membrane in contact with water vapor. For the membrane in contact with liquid water on both sides, the electro-osmotic drag coefficient in the membrane increases linearly with temperature. High-frequency resistances of the cells using Nafion 117 and 112 membranes are measured to evaluate the electro-osmotic drag coefficients obtained. The calculated membrane resistance based on a diffusive model agrees well with the experimental data under different operating conditions.

    AB - The electro-osmotic drag coefficient in Nafion 117 membrane is determined experimentally at different temperatures and water contents of the membrane. A pseudo-two-dimensional, steady-state diffusive model for water vapor transport through Nafion membrane based on nonequilibrium membrane/gas diffusion layer interface is presented to determine the electro-osmotic drag coefficient and average water content. For the membrane in contact with water vapor, the electro-osmotic drag coefficient increases with increasing water content or water activity in the membrane. At the same water activity, temperature does not show influence on the electro-osmotic drag coefficient in the membrane in contact with water vapor. For the membrane in contact with liquid water on both sides, the electro-osmotic drag coefficient in the membrane increases linearly with temperature. High-frequency resistances of the cells using Nafion 117 and 112 membranes are measured to evaluate the electro-osmotic drag coefficients obtained. The calculated membrane resistance based on a diffusive model agrees well with the experimental data under different operating conditions.

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